Sleeve extractor



6 w RW we 4 ma. m 8, m/ a 2 f s, wj 2 L m fw. V. B R G mmol, Mmw Km. E mEV ,Ed .Ee E.. Z .F e

Feb. 1'7, 41953 Patenied Feb. 17, 1953 UNITED STATES PATENT oFFlcE i2.628.420 SLEEVE ExrRAcroR Edwin E. Skilling, Chula Vista, Calif.,assignor to International Tool Corporation, Chula Vista, Calif., acorporation of California Application August 16, 1948, Serial No. 44,507

4 Claims.

1 This invention relates to means for extracting Sleeves from bodies,such as motor blocks, etc., and embodies certain improvements over meansfor a similar purpose shown in'Patent Number 2,547,345, granted to me onApril 3, 1951.

An object of the present invention is to provide a simple, economical,and satisfactory hydraulically operable mechanism affixed to thecylinder of a ram and adapted together with said cylinder to be insertedinto the bore of a sleeve carried by a body to an extent which, whenelements are disposed below or beyond an opposite end of the sleeve tothat in which the unit is inserted, and said elements are expandedsufciently to engage the adjacent end of the sleeve, will, uponapplication of pressure to the ram, eiectually and quickly remove thesleeve from the body.

More specifically, the invention contemplates the provision of aportable extractor unit including a cylinder, a uid pressure operatedram slidable therein, and an extractor head carried by the cylinder andembracing a cylindrical expander and a multiple fingered extractorreleasably adjustable on the cylinder and by reason of such adjustmentand the engagement of cooperating parts of the expander and extractor,the extractor is expanded to and retracted from position of operativeengagement with a sleeve to be removed.

Another object of the invention is to so arrange the expander andextractor on the cylinder that one of said elements may be anchored tothe cylinder while the other element is rotatively and axiallyadjustable on the anchored element.

A further object is to provide detachably one or both elements of theextractor head on the cylinder.

A still further object is to provide theextractor and expander elementswith interengaging frusto-conical annull, one of which is integral andthe other composed of a plurality of like Sections at the termini oftensioned iingers cut on a common Sleeve body, whereby the axialadjustment of the tensioned sections of one element over thefrusto-conical annulus of the other element will eiiect the expansionand retraction oi the lingers.

Other objects will appear as the description of the structure andoperation of the disclosed mechanism progresses. p

A preferred form of mechanism is shown in the annexed drawings, inwhich:

Fig. 1 is a small scale elevational view of a suitable primary powerunit and the instant extractor unit operatively associated for carryingout sleeve extracting and other operations;

Fig. 2 is a sectional elevation of a sleeve bearing body such as a motorblock in which the portable extracting unit is operatively mounted forremoving a sleeve, the extracting unit and portions of a hydrauliccylinder and ram being shown in section;

Fig. 3 is an external view of the extracting unit; and

Fig. 4 is a transverse view of the same on line 4 4 of Fig. 2.

Referring particularly to Fig. l, there is shown a primary power unit Mand a portable secondary applicator unit S operatively connected as andfor the purpose of removing sleeves from supporting bodies. The unit Mincludes a large cylinder C having a plunger D movable therein by airpressure from a source through an inlet 5. Plunger D has a stem D1extended therefrom into a hydraulic cylinder I and a piston Dz is fixedto said Stem for movement in cylinder I as plunger D is moved by airpressure.

Cylinder I has a head I which is connected by a flexible tube I2 with aninlet I I of head I and with unit S as by means of an inlet I0. Unit Sincludes a cylinder S1, a head S2 preferably welded as at I3 to saidcylinder, a piston S3 slidable in the cylinder, and a tubular stem Si towhich is affixed a foot S7 beyond the open lower end of the cylinder.Head Sz has'an extension I4 which is bored at I5 for the passage offluid from a radial port I6 leading from tube I2 into and from thecylinder Si above piston S3 as said piston is moved downwardly andupwardly on reverse strokes.

An elongated telescoping sleeve S5 is telescopically iitted overcylinder S1 and is formed with an external annular ange I1 at its lowerend to which is welded, as at I8, the upper end of a cylindricalextractor E whichn is longitudinally slit at uniformly spaced points I9,I9, etc. to form a plurality of tensioned nger sections 20, 20, etc. Thesections 2l! combine to form a multiple split annulus 2l withfrusto-conical inner surfaces 22 having their major dimensions at theirlower margins and the minor dimensions at their upper margins thereof.

A cylindrical expander E is telescopically fitted over cylinder S1 andis formed with an upper externally threaded section 13, a lower annulus24 having internal threads 3,5 screwed onto'the externally threadedlower end portion 26 of cylinder S1 and of frusto-conical cross Section,as shown in Fig. 2, to provide a tapered outer surbearing against andcooperating with said expander head whereby said nger terminals areexpanded and retracted in response to the axial movement of theextractor, for, respectively, engaging the nger terminals with a sleeveto be extracted and normal positions of disengagement With such sleeve,said expander head being internally threaded for attachment to saidcylinder and externally threaded for attachment to the extractor,whereby while the exp-ander is held stationary on the cylinder theextractor may be rotatably adjusted on the expander to eiectcorresponding axial adjustment of the extractor relative to theexpander, and means borne by said cylinder for operating the extractor.

EDWIN E. SKILLING.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

